CVE-2026-18403

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 79% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this weekElevated
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

LimeSurvey Community Edition 7.0.5 contains an authenticated SQL injection vulnerability in the Central Participant Database (CPDB) workflow that copies survey participant tokens to the central participant list.

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity60% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 14, 2026

Last Modified

August 14, 2026

Advisory Details (3)

Auto-updated Aug 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 7735ce31cea1 (LimeSurvey/LimeSurvey)

Fix landed in LimeSurvey/LimeSurvey commit 7735ce31cea1 — awaiting tagged release

https://github.com/LimeSurvey/LimeSurvey/commit/7735ce31cea1cad087b0c8556cb65a1c09e29cbd
generic

GitHub - LimeSurvey/LimeSurvey: 🔥 LimeSurvey – A powerful, open-source survey platform. A free alternative to SurveyMonkey, Typeform, Qualtrics, and Google Forms, making it simple to create online surveys and forms with unmatched flexibility. · GitHub

https://github.com/LimeSurvey/LimeSurvey/
generic

LimeSurvey Community Edition 7.0.5 - Authenticated SQL injection in CPDB | Fluid Attacks

https://fluidattacks.com/es/advisories/rihanna

Vendor Advisories for CVE-2026-18403(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 21× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 19:25 UTCGHSA enrichment
  3. 2026-08-19 19:34 UTCEG score recompute
  4. 2026-08-19 19:34 UTCGHSA enrichment
  5. 2026-08-19 17:03 UTCEPSS rescore
  6. 2026-08-18 19:43 UTCEG score recompute
  7. 2026-08-18 19:43 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 19:51 UTCEG score recompute
  10. 2026-08-17 19:51 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-16 20:00 UTCEG score recompute
  13. 2026-08-16 20:00 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 20:09 UTCEG score recompute
  17. 2026-08-15 20:09 UTCGHSA enrichment
  18. 2026-08-14 20:18 UTCEG score recompute
  19. 2026-08-14 19:36 UTCEG score recompute
  20. 2026-08-14 18:54 UTCEG score recompute
  21. 2026-08-14 18:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18403?
CVE-2026-18403 is a medium vulnerability published on August 14, 2026. LimeSurvey Community Edition 7.0.5 contains an authenticated SQL injection vulnerability in the Central Participant Database (CPDB) workflow that copies survey participant tokens to the central participant list.
When was CVE-2026-18403 disclosed?
CVE-2026-18403 was first published in the National Vulnerability Database on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18403 actively exploited?
CVE-2026-18403 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.4% of all scored CVEs.
What is the CVSS score of CVE-2026-18403?
CVE-2026-18403 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-18403?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18403, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-18403

Explore →

Is Your Infrastructure Affected by CVE-2026-18403?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs